. >> when it comes to improving grades, scientists in spain say girls have a leg up. they compared girls who walked or biked to school with girls who caught a ride. on average, the more physically active girls scored four points higher on math and verbal tests. the researchers say exercise made the difference, though they aren't sure why. it may have to do with increased blood flow to the brain. and here's something interesting -- exercise doesn't have the same effect on boys. >> from one of the best cooking schools in the world to your kitchen, here's another easy and fun recipe from the culinary institute of america. >> hi, my name is aubrey, and today, i'm going to tell you and show you what to do with those old bananas. sometimes, we just buy way too many bananas, and before you can slice them all on your cereal, they turn black. today, i'm going to show you what you can do with those bananas instead of making banana bread. this recipe calls for frozen bananas, so let's pretend these are on their way out and kind of brown. we're going to peel the banana and put it into a freezer bag.
